Mmmm, ok. Vanos solenoids cleaned.
New sparkplugs, non of the old really bad looking tbh.
Left chain tensioner changed. Old one not to bad but not very smooth anymore.

Unfortunately no influence on my rough idle. Car still shaking. Engine drops in rpm and then over compensates a bit. Seems quite random.

Will pull the trailer again next week so can check if the engine codes come back.